package enumerated;//: enumerated/SecurityCategory.java
// More succinct subcategorization of enums.
enum SecurityCategory {

  STOCK(Security.Stock.class),
  BOND(Security.Bond.class);

  Security[] values;

  SecurityCategory(Class<? extends Security> kind) {
    values = kind.getEnumConstants();
  }

  interface Security {
    enum Stock implements Security { SHORT, LONG, MARGIN }
    enum Bond implements Security { MUNICIPAL, JUNK }
  }

  public Security randomSelection() {

    return Enums.random(values);
  }
  public static void main(String[] args) {
    for(int i = 0; i < 10; i++) {
      SecurityCategory category = Enums.random(SecurityCategory.class);
      System.out.println(category + ": " + category.randomSelection());
    }
  }
} /* Output:
BOND: MUNICIPAL
BOND: MUNICIPAL
STOCK: MARGIN
STOCK: MARGIN
BOND: JUNK
STOCK: SHORT
STOCK: LONG
STOCK: LONG
BOND: MUNICIPAL
BOND: JUNK
*///:~
